Percussion-fuse.



Patented Oct. 4, 1910.

E. SCHNBIDBR. PERCUSSION FUSE.

Y APPLICATION FILED JUNE 20,1910.

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EUGENE SCHNEIDER, F LE CREUZOT, FRANCE.

PLERCUSSION-FUSE.

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, Specication of Letters Patent.

Patented Oct. 4, i910.

Application filed June 20, 1910. Serial No. 567,962.

To all whom it 'may concern:

Be it known that I, EUGENE SCHNEIDER, of Le Creuzot, Sane-et-Loire, France, have lnvented new 'and useful Improvements in .and Relatingrto Percussion-li`uses, which is fully .set forth in the following specification. This invent-ion relates to percussion fuses,

-and has for its chief object to cock the same` that isato say to release one of the parts which are normally separated and out of reach of each other, by the effect of the rotation ofthe fuse body relatively to a mass carrying one of the said parts.

'According to this invention the fuse body is provided internally with engaging projections and also with an internally or externally screw threaded guide into or onto which the block carrying the striker or the priming is' screwed. This block is itself provided with an extensible part normally resting upon-and outside of the engaging projections of the fuse body and which maintains the said block disengaged until the shot is iired. The rotary movement of the fired projectile produces a limited screw-l ing of the fuse body upon the said block and a compression of the extensible part to allow longitudinal movement of the block to take place lso that the said block is engaged *be* hind the projections, thereby cooking the fuse. rlfhe block is held in this position, its screwing being limited by its bearing upon the threaded guide.; the charge of the projectile is ignited when it strikes the object owing to the priming and the striker coming into contact under the influence of momentum.

In order that my said invention may be clearly understood and readily carried into effect, the same will be described with reference to the accompanying drawings, in which Figure 1 is a longitudinal section of one constructional form of my device, thek parts being represented in the position of rest. Fig. 2 is a similar section of a modified constructional form, the parts heilig represented in the position in which the fuse is cocked. Fig. 3 is a plan on the line A-A in Figf 2. Figs. 4 and 5 illustrate two further modiications of the invention in sectional elevation- In these figures, l designates the body of the fuse provided with engaging members which may be constituted, for example by a crown a, projecting from the inner wall and presenting externally a 4chamfer or beveled face Z2 upon which, in the condition of rest, the extensible part bears; this part is fitted to a screw threaded block 2 carrying one of the two igniting elements c. either the priming or the striker) lfor examplel the striker c asl shown inFigs. l, 2 and il. The fuse body is furnished with an axial guide d suitably screw threaded for the reception of the mass The extensible; part with which this latter is provided may comprise segments 3 engaging in a groove 4 in the block 2 and held apart by a spring 5 (Fig. 3). In the condition of rest, the segments 3 bear upon the chamfer Z) on the engaging projection a. An auxiliary spring (i normally assists in holding theblock 2 in the position of rest. That one of the igniting elements which is not carried by the block 2 (the striker c, in the case illustrated in Fig. 5) is carried by a block S freely guided in the body 0f the fuse and which may work in a smooth rearward extension d 'of the screw threaded guide d. A' spring 9, one end of which rests upon the fuse body and its other end upon the block 8, normally holds the latter away from the block 2.

' When the shot is red thebody 1 of the fuse in rotating is screw. d, by means of its screw threaded guide upon the corresponding thread on the block 2 which does not participate in any movement of rotation. This screwing compresses the extensible part 3, andthe s ring 5'is compressed and they segments sli e upon the chamfer b'. The

screwing of the fuse body upon the block 2 is limited by the guide d strikin against the block 2 as shown in F"g. 2. t this moment the segments 3 have `passed beyond the engaging crown a and the spring 5t inv extending separates the said segments which engage'behiud the crown. The fuseis then cocked and 'complete immobility of the block 2 is insured, the engagement of the segments preventing any unscrewing- As soon as the projectile encounters an obstacle the block compresses its retaining spring 9, and moves 'forward to cause the priming 7 and the striker c to meet.

The engaging crown a instead of being integral with the body of the fuse, as is the casein the examples illustrated in Figs. ll', i and 5, may be carried by a separate part. as shown in the constructional form illustrated in Fig. 2. ln this example, the crown a forms a projection uponthe upper end` of lOy fNAs 'above stated, the block 2y which is screwed upon the threaded guide Z of, the

fuse body, may carry either of tlie firing elements, desired. In the example represented in Figs. l 4to a, the said mass carries the striker' C, while the priming 7 is carried by the freely guided block 8; in the example illustrated in Fig. 5 the reverse arrangement is represented.

The screw threads of the guide d may be internal as in the example represented in Figs. l, 2 and 5, the bloek being then provided with a corresponding external screw thread. It may also be external as shown in Fig. 4, the block 2 then carrying a corresponding internally screw threaded socket.

It will readily bc understood that the striker is normally held away from the priming at a greater distance than that required in order that ignition may be effected owing to the inertia ot' the block, the additional interval ot' space being only traversed when the shot is `tired, owing to the rotation of the fuse body and upon that one of the igniting elements which is not carried by the block. VThe result of this arrangement is that absolute safety is secured during transportation and manipulation ot' the projectile.

What I laim and desire to secure by Letters Pit-ten of the United .States is l. A percussion fuse for projectiles comprising in combination a fuse casing provided With a guide sleeve fast thereto and 'having a screw thread, a spring-pressed block having a telescoping engagement with said sleeve and normallylfeld out of tiring position by said spring, al second springpressed block -having a screw-threaded engagen'ient with said sleeve and a springprcssed membercarried by said block for locking the saine in safety position, said locking means being disengaged from safety position by rotation of said sleeve on said last-named block when the projectile is tired,

which is provided with a screw-thread engaging that of said sleeve, spring-pressed. locking means for locking said rblock in safety position, said locking means being released by rotation of said sleeve on said threaded block when the projectile is tired7 and means locking said block against relative movement to said sleeve.

3. A percussion fuse for projectiles coin prising in combination a fuse easing, provided with a screw-threaded guide sleeve fast thereon, oppositely disposed springpressed blocks guided by said sleeve, one of which carries a tiring pin and the other a firing element, one of said blocks having a screw -thread engaging said sleeve,l and spring-pressed locking means carried by said last-named block adapted to engage said casing for holding the block in safety position, said locking means being released by 'rotation of said sleeve on said threaded block when the projectile is tired, andl means locking said block against movement relative to said sleeve. y

4;. A percussion fuse for projectiles comprising in combination a fuse casing provided with a screw-threaded guide sleeve tast thereon, oppositely-disposedspring-pressed .i

firing blocks guided by said sleeve, one of which has a threaded engagement with said sleeve and the other ha ving a telescoping engagement therewith, spring-pressed locking means for locking the first-named block in` safety position, said locking means being released by rotation of said sleeve on said threaded block when the projectile is tired,

and means locking said block against relative movement to said sleeve.

In testimony whereot I have signed this specification in llie presence ot two subscribing witnesses.

l EUGENE SCHNEIDER.

liti'iesses DEAN li. Mason, R. ne Stvictinoicii. 

